<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/', name: '首页' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--    卡片试图区域-->
    <el-card :body-style="{ padding: '0px' }">
      <div slot="header">
        <span><!-- card title --></span>
      </div>
      <!-- card body -->
      <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 700px;height:400px;"></div>
    </el-card>

  </div>
</template>

<script>
  // 1.导入echart
  import echarts from 'echarts'
  import _ from 'lodash'

  export default {
    data() {
      return {
        // 需要合并的数据
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: '#E9EEF3'
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [{
            type: 'value'
          }]
        }
      }
    },
    created() {

    },
    // 此时页面上的元素已经被渲染完毕
    async mounted() {

      // 3.基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'))

      const { data: res } = await this.$http.get('reports/type/1')
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取折线图数据失败')
      }


      // 4.指定图表的配置项和数据
      const result = _.merge(res.data, this.options)
      // 5.使用刚指定的配置项和数据显示图表。
      myChart.setOption(result)

    },
    methods: {}
  }
</script>

<style>

</style>
